Dr. Michael Davidson played in a band called Off Label during the little free time he had.

"He really radiated a joy when he played guitar that was infectious to the rest of us," said band mate Shira Doron.

A group of medical professionals started the band, which practiced on Sunday nights.

"He would come with a lot of stress and leave feeling a heck of a lot better," she said.

Davidson played guitar and would play at bars and house parties.

Band mates say his first priorities were his family and his career, but music was an outlet to relieve stress.

"It's hard to imagine that we won't ever see that smile that he gets when he has left the world behind and is making rock and roll music and jumping around," Doron said.

Police said gunman Stephen Pasceri, of Millbury, entered the hospital Tuesday morning looking for Davidson and then shot him twice.

He then killed himself and police found the gun next to his body.

Pasceri's brother and sister said they think he held Davidson responsible for the November death of their mother.

Davidson's funeral is Friday at Temple Beth Elohim in Wellesley, where he lived with his wife, plastic surgeon Terri Halperin, and their children, ages 9, 7 and 2.

Colleagues said Halperin is seven months pregnant with the couple's fourth child.

The Dr. Michael J. Davidson Family Fund has been established at RTN Federal Credit Union. If you wish to contribute, you may click here or you may send a check for the Dr. Michael J. Davidson Family Fund to RTN Federal Credit Union, 600 Main St., Waltham, MA, 02452.